# PGM 读书笔记节选（二）

$\displaystyle \Pr(X_1, \ldots, X_n) = \frac{1}{Z}\prod_{i = 1}^C \phi_i (X_{C_i})$

• local Markov independencies：一个 node 与非相邻 node 在给定其 neighbors 时条件独立
• pairwise Markov independencies：任意两个不相邻顶点在给定其他节点时条件独立

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And it came to pass, when God destroyed the cities of the plain, that God remembered Abraham, and sent Lot out of the middle of the overthrow, when he overthrew the cities in the which Lot dwelled.